Fig. 9. Photomicrographs of sections of ovarian pieces stained with haematoxylin and eosin. (A-D) Ovaries were cultured for 7 days in control medium (A), medium containing 10 µg ml^–1 anti-BDNF (B), medium containing 10 µg ml^–1 anti-NT4 (C) and medium containing 10 µg ml^–1 each of anti-BDNF and of anti-NT4 (D). Areas around the edge of ovaries cultured in the presence of antibodies had few if any germ cells. These ovaries also often contained dying/dead oocytes (white arrowheads).